Nanotechnology is one of the hottest areas of the plastics industry today. Injection press maker Nissei Plastic Industrial Co. Ltd. has taken it a step further by compounding its own carbon nanotubes.
Nanotechnology and bioresins another promising new area were the themes of the company's booth at NPE2009. Making the actual nanomaterials sets Nissei apart from other plastics machinery manufacturers, said Nobu Kobayashi, marketing team coordinator of Nissei America Inc., the Japanese company's U.S. operation in Anaheim, Calif.
We like to sell the molding machine and the material to the customer, all together. It's a one-piece solution to the customer, and we know the carbon nanotube technology will be huge in the future, Kobayashi said in an interview during NPE.
At the trade show, Nissei ran parts on a hybrid PNX-series machine with 45 tons of clamping force, housed in a Class 100,000 clean room. The press molded trays to carry computer chips or circuit boards, from Nissei's carbon nanotube material, dubbed Voltiga.
For the application, molding the trays from Voltiga and high-impact polystyrene gives improved properties over the traditional materials such as polystyrene or ABS, Kobayashi said. The HIPS/nanotubes combination resists static electricity, which can damage the product. And it's equally strong or stronger than glass-filled material, he said.
The PS or ABS carrier trays also require the costly second step of adding an anti-static coating, he said.
The Voltiga press is equipped with Nissei's special VT screw, which minimizes the deterioration of the carbon nanotube composite materials.
Nissei makes the nanotubes at its Nanomaterial Division compounding plant, located in its machinery factory in Niigata, Japan. Working with a university, Nissei developed a proprietary technology called teh pre-mixing method that enables the company to make its own nanomaterials.
Nissei is based in Nagano, Japan.
The term nano means one billionth. Nano-sized particles can be used to add multiple functions to the performance of the molded part, according to Atsushi Koide, director and general manager of Nissei's Nanomaterial Division. Nanotechnology can add electrical conductivity, thermal conductivity and mechanical strength, as well as dimensional accuracy, surface finish and moldability, he said via e-mail.
At NPE2009, Nissei also showed its green side by molding decorative plates from bio-based polylactic acid, on a 121-ton, all-electric NEX series press. NEX machines feature automatic clamping force correction, and high-precision metering control.
Nissei also produced O-rings from liquid silicone rubber on an 89-ton hybrid FNX series machine, also located in the clean room at the booth.
Both hybrid electric/hydraulic machines molding parts in the clean room were equipped with Nissei's X-Pump. The energy-saving pump technology combines the servomotor and hydraulic technologies as the driving source of the press. The servomotor only delivers power to the hydraulic pump when needed. When no power is required, it shuts off.
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